* autoconf/aclocal.m4: upgrade to autoconf-2.52 infrastructure,
sync with CLisp from CVS.
* autoconf/autoconf: Likewise.
* autoconf/autoconf.m4f: Likewise (new file).
* configure.ac: Likewise (new file, replaces configure.in).
* configure.in: Likewise (deleted, replaced by configure.ac).
* autoconf/config.{guess,sub}: Update to GNU version 2001-12-13.
* src/Makefile.in: made VPATH safe for autoconf-2.52.
* include/cln/config.h.in: Add __s390__.
* include/cln/version.h.in, src/base/verion.cc: New files.
* configure.in: Generate include/cln/version.h.
* cln.m4: Rewrote it. Check result of cln-config without compiling.
Do cross-check library version and header version information.
I am too lazy for a detailed discussion of all the changes.
Many identifiers got their `cl_' stripped off. Ok, this is a
clumpsy CVS log-entry. Promise: more will soon go into the
file ChangeLog. I apologize for the inconvenience. :-(